<template>
  <div>
    <el-row type="flex" justify="end">
      <el-select
        v-model="currentYear"
        size="small"
        style="width: 120px"
        @change="dateChange"
      >
        <el-option
          v-for="item in yearList"
          :key="item"
          :label="item"
          :value="item"
        >{{ item }}</el-option>
      </el-select>
      <el-select
        v-model="currentMonth"
        size="small"
        style="width: 120px; margin-left: 10px"
        @change="dateChange"
      >
        <el-option v-for="item in 12" :key="item" :label="item" :value="item">{{
          item
        }}</el-option>
      </el-select>
    </el-row>
    <el-calendar v-if="ishow" v-model="currentDate">
      <template v-slot:dateCell="{ date, data }" class="content">
        <div class="date-content">
          <span v-if="isWeek(date)" class="rest">休</span>
          <span v-else class="text"> {{ data.day | getDay }}</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script>
export default {
  filters: {
    getDay(oldVal) {
      return oldVal.split('-')[2]
    }
  },
  data() {
    const currentDate = new Date()
    const currentMonth = currentDate.getMonth() + 1
    const currentYear = currentDate.getFullYear()
    const yearList = []
    for (let i = 0; i < 11; i++) {
      yearList.push(currentYear - 5 + i)
    }
    // console.log(yearList);
    return {
      currentDate,
      currentMonth,
      currentYear,
      yearList,
      ishow: true
    }
  },
  watch: {
    // 下拉选项关联日历
    currentDate(val) {
      this.currentYear = val.getFullYear()
      this.currentMonth = val.getMonth() + 1
    },
    // 侦听语言，侦听对象中的某个属性，写法如下：
    '$i18n.locale'() {
      // 解决日历组件 多语言切换不实时更新语言问题
      this.ishow = false
      this.$nextTick(() => {
        this.ishow = true
      })
    }
  },
  methods: {
    dateChange() {
      // 重新计算 currentDate 触发日历更新即可
      this.currentDate = new Date(`${this.currentYear}-${this.currentMonth}`)
    },
    isWeek(date) {
      // 根据传入的日期是否为周末, 返回 true / false
      return date.getDay() === 6 || date.getDay() === 0
    }
  }
}
</script>

  <style  scoped>
  ::v-deep .el-calendar-day {
    height: auto;
  }
  ::v-deep .el-calendar-table__row td,
  ::v-deep .el-calendar-table tr td:first-child,
  ::v-deep .el-calendar-table__row td.prev {
    border: none;
  }
  .date-content {
    height: 40px;
    text-align: center;
    line-height: 40px;
    font-size: 14px;
  }
  .date-content .rest {
    color: #fff;
    border-radius: 50%;
    background: rgb(250, 124, 77);
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
    font-size: 12px;
    margin-left: 10px;
  }
  .date-content .text {
    width: 20px;
    height: 20px;
    line-height: 20px;
    display: inline-block;
  }
  ::v-deep .el-calendar-table td.is-selected .text {
    background: #409eff;
    color: #fff;
    border-radius: 50%;
  }
  ::v-deep .el-calendar__header {
    display: none;
  }
  </style>
